RECORD: Darwin, C. R. 1881. [annotated diagram of plant experiments] [application of acetic acid]. CUL-DAR52.F12. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed and edited by John van Wyhe 12.2025. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin. The folder CUL-DAR52F contains notes on the aggregation of chlorophyll bodies.


F12

12. 50'

(p. 2

Oct 4

12 50'

7. P.m

 ill-defined grains have developed in middle of [illeg]

Cell 3

(3) 7 P.m

6. P.m' Green very pale — perhaps candle light

7. 10 P.m → Much dark granular

4

(4)

At 9. P.m. no change in form In some filament spiral bend still characteristic visible.—

 Cell I

2

3→

4→

4.—4. 15' P.m

granules or sph many cells rather spherical

4. 5' [illeg] this has disappeared

4. 10' has almost but disappered

grain [sketch]—again pear-shaped 4. 10 strongly protracted

4. P.m

—I saw this contract into sphere ova  'oval

F12b

Oct 5 8. a.m

Acetic A. no effect except making cells more transparent & green brighter 8. 30' a.m. does not act on granular matter — & good deal of Chlorophyll left

[sketches] (1)    (1)

(2)    (2)

Oct 5' 8. a m

outline of green masses very pure

3 (3)

4    (4)

In terminal joint of existing filament still the spiral bend & much granular matter — which seem in most case deposited on walls of cells & mingled with green matter


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 7 January, 2026